Improvement in flock-grinders



` i 2 Sheets--Shet i. E. T. MARBLE.

Flock Grinders. No, 124,903. Patented March2e,11a72.

2 Sheets--Sheet 2. E. T. MARBLE.

Flock Grinders.

Patented March 26, `1872- Dial ` UNITE I STATES EDWIN T MARBLE, OF WORCESTER', MASSACHUSETTS.A

IMPROVEMENT IN FLOCK-GRINDERS.

Specification forming part of Letters Patent No. 124,903, dated March 26, 1672.

ing to be a full, clear, and exact .description of i the same, reference being had to the accompanying drawing which forms a part of this speciiicatiom and in which'- Figure 1 represents a plan view of my iinproved flock-grinder. Fig. 2 represents atransverse section of the grinding-cylinder and core, and Fig. 3 represents a view of the cylinder with one side relnoved to show longitudinal sections of lags and cutters.

The nature of my invention consists in certain devices for adjusting the grinding-cutters and their holding-lags within their conical shell or cylinder.

In the drawing7 the parts marked A represent the conical shell or grinding-cylinder. B indicates the core or grinder; C, the drivingshaft; D, the hopper; and E, the supportingframe; which parts are constructed and arranged substantially as shown in the drawing. Vithin the interior of the shell A I arrange a series of grinding-cutters, F,Iset vinto longitudinal grooves so as to stand radially in the shell. Each alternate space between the cutters F is lilled with a wedgeshaped lag, G, and the other spaces with similar formed projecting` portions A of the shell A. The lags Gr serve to hold the cutters in position, and they are adjusted to press with greater or less force against the cutters by means of adjusting-screws I, which are arranged for that purpose through the shell A, with their ends against the backs of the lags Gr. By turning in the screws the lags are forced inward toward the center of the cylindrical shell, and, owing to the decrease in the width of the angular space, the cutters are thereby firmly clamped between the lags G and projections A', as indicated in Fig. V2. `The lags Gr are made of such size that they will slip into place freely when the screws I are turned out, without binding at the side against the cutter, and the clamping pressure is produced wholly by means of the screws I. 'Adjusting-screws K are arranged through the shell A, which set against the backs ofthe cutters F, for the pur-` pose of setting them forward, to compensate for wear or to adjust them to any desired position. The core Bis finished with a series of radial grinding-cutters, L, arranged spirally, as indicated. The action ofthe cutters F and L against each other in the manner of shears, as the core B is revolved, cuts and grinds thc iiocks; the material being fed into the machine through the hopper D, and discharged therefrom through an opening in the cylinder-head at M. The core can be adjusted to cut properly by means of the screw N at the end of the shaft'C, and the machine is operated by a belt 2. The combination, with the shell A, cutters- F, and Wedge shaped-lags G, ofthe adjustingscrews I 'and K, substantially as and for the purposes set forth. p.

EDWIN T. MARBLE.

Witnesses: n

THos. H. DODGE, CEAS. BURLEIGH. 

